var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");
const cors = require("cors");
var session = require('express-session');
var indexRouter = require("./routes/index");
var usersRouter = require("./routes/users");
const apiRouter = require("./routes/api");

var app = express();

app.use(cors());
// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");
// 使用session中间件
app.use(session({
  secret :  'secret', // 对session id 相关的cookie 进行签名
  resave : true,
  saveUninitialized: false, // 是否保存未初始化的会话
  cookie : {
      maxAge : 1000 * 60 * 3, // 设置 session 的有效时间，单位毫秒 3min
  },
}));
app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));

app.use("/", indexRouter);
app.use("/users", usersRouter);
app.use("/api", apiRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render("error");
});

module.exports = app;
